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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
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Stability of Conjugated Dienes01:28

Stability of Conjugated Dienes

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Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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New Biobased Plasticizers for PVC Derived from Saturated Dimerized Fatty Acids.

Patryk Dziendzioł1,2,3, Sylwia Waśkiewicz1, Katarzyna Jaszcz1

  • 1Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology, M. Strzody 9, 44-100 Gliwice, Poland.

Materials (Basel, Switzerland)
|May 14, 2025
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Summary

Researchers developed new biobased oligoesters as safe, non-toxic plasticizers for poly(vinyl chloride) (PVC). These eco-friendly alternatives show promising compatibility and plasticizing ability, addressing concerns with traditional phthalates.

Keywords:
biobasedcompatibilitydimerized fatty aciddry blendpolymeric plasticizer

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Area of Science:

  • Polymer Science
  • Materials Chemistry
  • Green Chemistry

Background:

  • Phthalates, widely used as PVC plasticizers, pose significant health and environmental risks as endocrine disruptors.
  • There is a growing market demand for sustainable, non-toxic plasticizers due to legislative changes and environmental concerns.
  • Traditional phthalate plasticizers face increasing scrutiny, necessitating the development of safer alternatives.

Purpose of the Study:

  • To synthesize and characterize novel biobased oligoesters as potential replacements for phthalate plasticizers in poly(vinyl chloride) (PVC).
  • To evaluate the compatibility, plasticizing efficiency, and performance properties of these new oligoesters in PVC formulations.
  • To compare the properties of the novel biobased plasticizers with commercially available phthalate plasticizers.

Main Methods:

  • Oligoester synthesis via polyesterification of dimerized fatty acid (DFA), adipic acid (ADA), triethylene glycol (TEG), and 2-ethylhexanol (2-EH).
  • Characterization using nuclear magnetic resonance (NMR), size exclusion chromatography (SEC), and viscosity measurements.
  • PVC film preparation by casting, followed by testing for plasticizer migration, hardness, thermal stability (TGA, DSC), and mechanical strength.

Main Results:

  • Oligoesters synthesized at a 9:1 molar ratio of ADA to DFA with excess 2-EH demonstrated excellent compatibility and plasticizing performance in PVC.
  • Increased DFA content negatively impacted oligoester compatibility with PVC.
  • A 4:1 ADA-to-DFA ratio yielded oligoesters suitable for use at lower concentrations or in blends.

Conclusions:

  • Biobased oligoesters derived from DFA and ADA show significant potential as environmentally friendly and non-toxic plasticizers for PVC.
  • Optimized synthesis ratios are crucial for achieving desired compatibility and performance in PVC applications.
  • These novel oligoesters offer a sustainable alternative to conventional phthalate plasticizers, aligning with green chemistry principles.